Type-writing machine.



N. n lmumsqm TYPE WRITING MAflilNE. APPLICATKON HLED SEPT- 32, 1933.

Patented Mar. 13, 1917.

2 HHEETS-SHEET l- Wl/E/VTOR ATTORNEY WITNESSES:

N. H.'AND ERSON.

V TYPLWRITING MACHINE. APPLICATION HLED SEPT-12.1913.

2 SHEETS-SHEET 2- 1,219,213. Paiented Mar.13, 1917.

llillllll' lllllll WITNE8$E8: INVENTOR v BY BMWMKK To all whom it may concern! UNITED STATES PATENT ms H. ANDERSON, or MIDDLETOWN, CONNECTICUT, ASSJGNOR "1 umrrs, TO'THE NOISELESS TYPE-WRITER COMPANY, or mmnfimowi'r OUT, A CORPORATION OF CONNECTICOT.

TYPE-WRITING MACHINE.

Be it' known that I, NILs H. Axnnnsox, a citizen of the United States, residing at Middletown, in the county of Middlesex and State of Connecticut, have invented certain new and useful Improvements in Type- Vriting Machines, of which the following is a full, clear, and exact description, such as will enableothers skilled in the art to which it appertains to make and use the'same.

This invention relates to typewriting machines, and with regard to certain more specific features thereof, to the escapement mechanism and intervening parts for controlling the letter-space movement of the carriage.

One of the objects of the present invention is to provide an escapement mechanism whichfwill be eiiicient in use and silent in operation. Afurther object is to provide a simple andpracticalescapement mechanism' having few parts which will be cheap to manufacture and assemble. A further object is to providea mechanism of thefirst above-mentioned character which will permit a rapid operation of the machine and an accurate, even movement of the carriage, properly timed with relation to the printing moment. Other objects will be in part 0bvious and in part pointed out hereinafter.

The inventlon accordingly consists in the features of construction, combinations of elements and arrangement of parts which will in the construction hereinbe exemplified and the scope of the applica after set forth,

' tion of which will be indicated in the followclaims.

i .f Tn the accompanying drawings, in wlnch is illustrated one of the various possible embodiments of the several features of the in- .vent1on,

Figure 1 is a side elevational view of a portion of a typewriting machine with certainlparts in section or broken away for the sake of clearness; Figs. 2 and 3 are, respectively, an inverted planand sectionalelevation of the escapement mechanism in normal position;

. Figs. 4; and 5 a,resi1nilarriews, respectively, of the mechanismin actuated posi- 1 Fig. G is an invert Teal leva qh sf qs partsshuwn in Fig- 25.

Specification of Letters Patent. Application filed September 12, 1913. I Serial No. 789,418 H tion. I This ex planat-io Fig. 4 is a settional vening mechan sin b. dogs and the carriage;

Fig. 8 is a settionalipl'a vice showing the tabul Fig. 9 is an elevation angles to Fig. 1'; and

Fig; 10 is a tottom'j Similar refer ence ch" lar parts throughout th the drawings.

forms of type riting'i] preferred man: 1er in .i is used, is that comii' an familiar with the ar escapement; that is one of the escapem ent wh is when the escapenient s may be termed the fi'ae' being in position withou liminar move'nent fonie e1 i git 1 P1981 sion of the next character jT'he priiitnig 0peration. is performed e starts from such positij'o' capement may have been v such movement at the ins or immediatel previousltli' of the carriage being'such printing so high tl'iattliei on the paper lefore the position of rest. This forr may also be used as an or'dina'r oi verse escapement in t "ns term is ordinarily un derstoo escapement 111i chanism" in w the escapemen; wheelwhenin nor active position rest against the 1,156 the. movable cog being leafs'e'd forward for engagement with the ne tsu'cceeding es'capement tooth, just' fpreaous 'to the printing moment the irr either brought torest t'einp laray fixed dog of. the escapejhie sequent to the printing l upon the amc unt of'd 6" dogs and the speed of p bring out more clearly the meaning of this term as well as certain features in connection with the present invention.

1913, Serial Referring now to the drawings in detail,

and more particularly to Fig. 1, a platen carriage 1 carries a-cylindrical platen roller 2 about which the paper is fed in a well known manner. Type carriers 3 are adapted to be connected to any suitable form of fin ger=actuated means (not shown), but preferably of that illustrated and described in my co pendirlgg application, filed August 6, y 0. 783,331, to move them into coactive relation with the paper carried by the platen as the carriage moves in a letterspacing direction; The carriage is supported on a shift rail 4 suitably mounted on arms 5 secured to the frame of the machine, whereby a vertical shift movement of the carriage, either above or below its normal printing position, may be obtained. The letter-spacing movement of the carriage is controlled by 'a rack and pinion mechanism in which the rack 6 is pivotally mounted upon the carriage and the pinion 7 is secured to the upper end of an escapement shaft 8. The lower end of the escapement shaft is provided with 'a carriage-controlling rack in the form ofan escapement .wheel 10 with which dogs carried by a rocker member 11 are adapted to coact. The rocker member 11 is actuated or rocked on each actuation of any character key through a universal bar and rock shaft mechanism.

Referring now in detail to the escapement mechanism, and more particularly to the detailed views of'Figsf2', 3, 4, 5 and 6,

bearing in mind that Figs. 2 and 4 are bottom plan views, the escapement rocker 11 is of U-shaped sheet metal constructiOn, as shown more clearly in Fig. 6. This rocker is adapted to oscillate in an escapement bracket 12 on pivot screws 13 engaging centers in the body portion of the rocker. The

normally downwardly extending arms 14 and 15 at either end of the body portion are for engagement with the driving connections from the space-bar and universal bar mechanisms, respectively. The body portion of the rocker is provided with oppositely disposed fore and aft projections or arms 16 and 17, the former having an offset portion 18 on which is pivotally mounted what will be hereinafter termed a fixed dog, 20, by means of a screw and nut 21.

The fixed dog engages normally the eseapement wheel 10 at one end, as shown, and is held in its normal position by the action of a coiled spring 22 holding a pin or stud of this forwardly projecting arm of the-es capement rocker body. is a m0vabledog 25 ring 36 which operates as a. cushion stop to pivotally mounted on a screw and nut 26. The forwarder normal positionof this dog, 25, as shown in Fig. 2, is maintained by the action of the coiled spring 22'- which,- in addition to being connected to the fixed dog, is also connected at its opposite end 27 to the movable dog, as shown, the onespring, therefore, acting to control .bo th dogs. I In order-to avoid any misunderstanding, 1t m ay be briefly explained that theffixed dog 1s fixed only in so far as its operation in co ntrolling the letter-space movement of the carriage s directly concerned; that is, during the usual operation of the machinefor feeding the carriage in a letter-spacing direction the dog has a relatively fixed position with respect to the rocker member 11 at all times. Its pivotal mounting is for the purpose of permitting it to swing out of the path of travel of the escapement wheel when the carriage is beingbalek spaced, or when released to permit the carriage to run free under the tabulator action.

The mechanism which controls the normal position of the movable dog, as shown in Fig. '2, or the stopping position of the dog whereby the carriage is silently arrested,'is shown in Fig. 4. This mechanism comprises a rearwardly extending portion 30 of the movable dog beyond its pivotal connection provided with a slot or separated members for engagement with the opposite sides of two members 31 and 32 mounted one above the other on a screw and nut 33 passing through an adjusting slot 34- in a rearwardly pro e'ct1ng arm 35 on the body portion-of the escapement rocker 11. The under member 31 is that which controls .the movement of the movable dog both to its active osition when engaged by the es'capement W eel, and in the act of silently'stopping the car rlage, as shown in Fig. 4. Thls member 31 has a body portion in the form of a split arrest the movement of the movable dog" noiselessly. a

The member 32 is a safety member acting to prevent breakage of the member 31 under certain conditionsof possible incorrect op-. eration. It will be noted that bothof these members 31 and 32 are provided with curved or rounded front ends connected with their sov body portions by relatively narrow necks whereby they arepermitte'd to have arelative oscillating movement with respect to the.

part 30 of the movable dog. Bearing in, mind that the present invention is described in its preferred embodiment as a 'reverse escapement,-it will be noted that the escapem-ent wheel rests against the-fixed-dog 20 when the machine, is at rest".(Fi-g. 2),'-the movable dog being in its forwardhposition' ready for engagement with the nextsue: 1.

- eding teeth of the eseapement. wheel,

free letter-space movement before its next tooth contacts therewith. 'hen the escapement is actuated and the fixed dog is disengaged from thei'escapemcnt wheel, the next succeeding tooth'of the wheel engages the movable dog 25 and moves itto the stopping position, as shown in Fig. l of the drawings, where it is again brought to rest by the engagement of the slotted end of the-movabledog with the rounded end of the member 31. Since member 31 is provided with a split ring portion 36, there is a slight spring or cushioning action as the dog is brought to rest, which causes the silent arresting of the escapement wheel; as above mentioned. The continued movement of the escapement rocker in completing its cycle of operation to normal position, Fig. 2, re leases the movable dog 25, which passes forward to its normal position, leaving the escapement wheel bearing against the fixed tion.

dog 20 ready for the next printing opera- The action of the safety member 32 is to member 36 in case the escapement wheel 10 is reversed by theback-spacing mechanism or otherwise, while the movable dog 20 1s 1n engagement with .the escapement wheel.

The dotted line in Fig. 1 below the end 31 shows the shape of the end of the member 32 and it will be noted that a slight clearance is provided whereby, if the escapement wheel is reversed while the movable dog is in engagement with a tooth thereof, as shown in Fig. l. the same is locked by the member 32 against movement withoutpermittin'ga breaking strain to be brought to bearupoh the part 36.

\Vith the escapement used in the reversed form, as above described, a clutch intermediate of the dog rocker and the carriage rack 6 to'permit a return of the carriage to line-commencement position is unnecessary,

' for the backward movement of the carriage brings into action the pivotal mounting 21 of the fixed dog.

To control"the' relation between the working surfaces of th'edogs, or to control the drop from one dog to the other, the shouldered pivot screw 33 upon the shouldered portion ofwhich the members 31 and 32 are adapted to turn, is mounted in the slot 31 dog. It will thusbe seen that the adjustthis slot, wi

concentric'with the pivot :26 of the movable ment. of the pivot 33 to various positions in movable ,dog and the moment of contact between the next succeedingtooth of the es- 1 control the position ofthe.

.capement wheel and the dog, as well as the the other,'the movable dog then being located on the up per surface of the body of the rocker and ahefixed dog on the lower surface thereof, or the. relative position being reversed to that shown in Figs. 2 and 3. \Vhen used in :his way the movable dog normally engages the escapement wheel when at rest, and it is, therefore, necessary to provide either a clutch between the escapement wheel and carriage, or to provide the movable dog with a pivot end somewhat similar to the ct nstruction of the} fixed dog, shown in Figs. 2 and 3, so that {it may release when the esacapement wheel is reversed.

The interveni 1g mechanism between the escapement rock :r and the carriage is shown in detail in Figs. 7 to 10 inclusive, and the escapement shaf; 8 is secured and rotated at its upper end in a ball-bearing trunnion 40 mounted in an uscapment shaft bracket 41, which bracket is secured to the fixed carriage shift rail 1 along which the carriage travels. The purpose of the trunnion mounting is to admit of a fore and aft adjusting movement of the carriage when'using different thicknesses or varying numbers of sheets of paper in order that the surface of the outer sheet may be properly posie tioned with respect to the printing plane located at the 'Eld of the path of travel of the several typo carriers. The upper end of the escapement shaft 8' is reduced in ,diameter and carries an upper and lower ball flange 15 extending partially over the upper surface of the trunnion ring to prevent dust and dirt f. om clogging the ball bearing's. The whole combination is locked in place by lock nut 46 acting "upon the upper ball raceway, 1 rhich is also threaded for engagement with the reduced end of the escapement shaft.

The lower ent of a plate 47 mount ed in the escapement bracket 12 and carries the escapement wheel 10 and tabulator brake disk -18, with which a'suitable brake shoe 50 is adapted to coact when the tabulating mechanism (not herein shown or described) is brought intooperation. A hub 51 onw-hi :11 the escapementwheel is the shaft is positioned in keyed loosely surrounds the .escapement shaft to permit fore and aft movement of its relatively to the normal "printing plane and also provides a support for a plurality of rollers turning about horizontal axes substantially tangentially disposed with re-,

spect to the escapement shaft 8, as shown in Fig. 10.

ing the machine, as well as provides a stronger, cheaper and more durable device.

It is believed that the operation of this device is clear from the above description and a reiteration thereof is unnecessary.

The invention is simple and practical in construction and is silent and rapid in its operation, thereby accomplishing,among others, all'of the objects and advantages above set forth.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

- Having described my invention, What I I claim as new and desire to secure Patent 1s:

' said rocker member, one of said dogs having a normally fixed relation and the other by Letters 1. In an escapement mechanism for typewriters, in combination, a feed rack, a dog rocker, a dog 'carrler medially pivoted on said rocker and extending toward and away from said rack, and a pivotal member carried by said rocker to coact with that portion of said dog carrier on the side of its pivotalaxisfaway from said rack for controlling said-dog carrier.

2. In anesfcapement mechanism for typewriters, in combination, a horizontally disposed dog -.'rocker having front and rear arms, a movable dog carrier mounted upon said front arm, and adjustable means mounted on said rear arm for limiting movement of said dog carrier.

3. In an escapement mechanism, in combination, a rocker member, pivotally mounted dogs mounted upon the opposite sides of of'said dogs being movable, and means cooperative with said movable dog adapted to arrest silently the movement of the member to be spaced. 1

4. In an escapement mechanism, in comlhese rolls coact with vertical. grooves '53 in the escapement shaft, and the mounted thereon, anda split ring member coacting with said movement.

6. In an escapement mechanism, in combination, a rocker member, a movable dog mounted thereon, a split ring membercoacting with said dog for cushioning its movement, andmeans for adjusting the position of said ring for controlling the position of said dog. I

7. In an escapement mechanism, in combination, a rocker member, a dog pivotally mounted intermediate its ends, one end being provided with a tooth adapted to coact with the member to be spaced, and the opposite end being provided witha slot,

dog for cushioning and a resilient member coacting with the slot for arresting the movement of the dog.

8. In an escapement mechanism, in combination, a rocker member, adog pivotally mounted intermediate its ends one end being provided with a tooth adapted to coact with the member to be spaced, and the opposite end being provided with a slot, and a ring member coacting with the slot in the movable do for silently arresting its movement in one (firection.

9. In an escapement mechanism, incombination, a rocker member, a dog pivotally mounted intermediate its ends, one end being provided with a tooth, adapted to coact with the member to be spaced, and the opposite end being provided with a slot, and a pivotally mounted split ring member coacting with the movable'dog for controlling its position. 10. In an escapement' mechanism, in combination, a rocker member, a dog pivotally' mounted intermediate. its ends, one end being provided with a tooth adapted to coact with the member to be spaced, a ring member coacting with the other end of the movable dog for silently arresting its, movement in one direction, and a safety member associated with said ring member.

11. In an escapement mechanism, in combination, a rocker member, a ivotally mounted dog provided with a toot adapted to coact with'the member to be spaced, a

member coacting with the :movable' dog for. silently arresting its movement in' rin one direction, and a. pivotally ,mounted safety member positioned beneath said ring giember adapted to coact with the movable og. V

12. In an escapement mechanism, in combination, a rocker member, a fixed dog and movable dog on the opposite side of said rocker member, a spring connected to the tail of said movable dog adapted to hold it in normal forward position, and a second sprin adapted to coact with the tail of said dog or cushioning its movement when engaged with the member to be spaced.

14. In an escapement mechanism, in combination, a rocker member, a movable dog on said rocker member pivotally mounted intermediate its ends, a spring connected to the tail of said movable dog adapted to hold it in normal forward position, and a second spring adapted to coact withthe tail of said dog for cushioning its movement when engaged with the member to be spaced, said second spring being in the form of a split ring pivotally mounted on one side opposite the point of engagement between the ring and the dog.

14. In an engagement mechanism, in combination, a rocker member, a movable dog on said rocker member pivotally mounted intermediate its ends, a spring connected to the tail of said movable dog adapted to hold it in normal forward position, a second spring adapted to coact with said dog for cushioning its movement when engaged with the member to be spaced, ,saidsecond spring being in the form of a split ring pivotally mounted on one end opposite the point of'engagement between the ring and the dog, and a safety device coacting with Said movable dog adapted to prevent ex cessive strain from being transmitted to the split ring;

- 15. In an escapement mechanism, in combination, a rocker'member having an offset forwardly extending arm, a dog pivotally mounted at the end of said arm, and a second dog pivotally mounted near the middle of said arm but'on the opposite side of the rocker member.

16. In an escapement mechanism, in combination, a rocker member having an arm, a

, dog pivotally mounted at the end of said arm, a second dpg mounted near the middle of said arm, a: spring connected to the tail of one of said dogs, and a second spring coacting with the tailat the other of said dogs, said second mentioned spring being adapted to silentla arrest the movementof sald recess and coavting,

the dog with which it coacts. h 1 17. In an escapement mechamsm,-1n combination, a rocker member, a dog adapted to; I coast with the member to be spaced, a jsecg 0nd dog having a position slightly forward of the tooth of the first dog and out of the plane of, the -member to be spaced, and

ment of the latter.

spaced, said spring being, e iformjof a pivotally mounted spl-i 1 18. In an escapnnent neehen Sm doom-P bination, a rockel I member, ai ,h 1di adapted to coact with; tlie iine nb, spaced, a movable dog-ha "ng a? p03; sition slightly for ward; o gitooth; iQLfI-Ptihii. 15 holding dog and out 'iof the; plane ioif the member to be spaced, oat ing with said movable -v lently arrest its movemen ,iv, the plane of and engagecl bygag.subsequent tooth of the meniber ,to, spaced am; coiled spring con iectingathe tail dogs, adapted to restoregand parts in normal position. W 19; In a typewuitinQangehi e in ceombiz- 85 nation, a shiftable platen marriage;ian-eesa capement shaft op zrativelv onnectedft-herewith, an escapemei 1t whe IIIQ'OIlIlhQ-fl DHJSilltl shaft, and ESCQPQIJQII; eclmnism- -,coacting with said wheel, slidesca me li aftzand 96 wheel being formed to ha ,a'T-relativelydon gitudinal movement to}- per nit gtl il g toabe shifted independently of me-nt mechanism.v 20. In a typewriting: ,1 nation, a shiftablo platei i c capement shaft ha wingan ope tion therewith, an escape nent wl ed to rotate with saidsha ,7 to have a longitudinali ,vzelnent spect thereto, and a pli al itycof acting with said shaftadapted-to said movement.

1;, 21. In an escapement anecha typewriters, in cor 1bination,,,a ,ho a stepping dog, re iilien stepping dog away fro aidholc lging d g and a pivoted meniber inte ockedavith, said; stepping dog to move with and-limit movewriters, in combinati pivoted members, one a e ap s and the other a controlling element said members hav ng c mediate their ,pivc tal a In an escap'ementmec a writers, in combinationpivoted stepping t 0g there cess. and a movable con' said dog having a po of to limit silently he dog. v

2%. In an estapelu writers, in. conibinati oted stepping'gt m by said rack," g'ipe dog in the other direction, and a movable member interlocked with said dog for limiting movement of the latter by said rack and by said means 25. In an escapement mechanism for typewriters, in combination, two eccentrically pivoted members, one an escapement dog and the other a controlling element therefor, said members having coacting parts to limit the pivotal movements of said dog, and means permitting adjustment of the axis of one of said members to vary the arc of movement of said dog.

26. In an escapement mechanism for typewriters, in combination, two eccentrically pivoted members, one an escapement dog and the other a controlling element therefor, said members having interlocked parts to limit the pivotal movements of each, and means permitting adjustment of the axis of said controlling element to vary the arc of movement of said dog.

27. In an escapement mechanism for typewriters, in combination, a rotatable shaft, an escapement rack thereon, and operative connecting means between said elements for insuring synchronous rotative movement while permitting relative axial movement thereof.

' 28. In an escapement mechanism for typewriters, in combination, a rotatable shaft, arr escapement rack thereon, and operative connecting means between said elements inclnding a groove in one and a part on the other fitting said groove for insuring synchronous rotative movement while permitting relative axial movement thereof.

29. In an escapement mechanism for type writers, in combination, a rotatable shaft, an escapement rack thereon, and operative connecting means between said elements comprising axial grooves in said shaft and rollers carried by said rack working in said grooves for insuring synchronous rotative movement Wl'lll permitting relative axial movement of said shaft and rack.

tion and a yieldin 30. In an escapement mechanism, in combination, an escapement rack, a dog, a second dog adapted to move toward and away from said first dog, means adapted to provide a continuous yielding resistanceto the movement of said second dog in one direc tion and a yielding stop adapted to limit said movement, and a safety device adapted to coact with said movable dog to avoid undue strain. on said yielding stop.

31. In an, escapement mechanism, in combination, an escapement rack, a dog, a second dog adapted to move toward and away from said first dog, means adapted to provide a continuous yielding resistance to the movement of said second dog in one direcstop adapted to limit said movement, said comprising a wip'ercontact connection second dog and said escapement wheel being connected to rotate with said shaft and to permit relative longitudinal movement ther eof.

33. In a typewriting achine, the combination of,a carriage; an escapement mechanism therefor comprising a. ,feed rack, a dog rocker, a stepping dog pivoted on one side of the dog rocker to move in the general direction of movement of tlje adjacent teeth of the feed raick, and a hblding dog pivoted on the other side of the dog rocker for movement thereon at substantially right angles to the direction of movement of" the adjacent teeth of the feed rack and into and out of engagement therewith.

34. In a typewriting machine, the combination of a carriage; and escapement mechanism therefor comprisin a feed rack, a dog rocker, a stepping doi pivoted on one side of the dog rocker to inove. in' the general direction of movement of the adjacent teeth of the feed rack, a holding dog pivoted on the other side of the dog rocker for movement thereon at substantially right angles to the direction of movement of the adjacent teeth of the feed rack and into and out of engagement therewith, and a single contractile spring operatively connected at one end to the holding dog and at its opposite end to the stepping dog and operative on both dogs.

35. In an escapement for typewriters, in combination, a feed rack, a dog rocker extending substantially in the plane of said rack, a dog carrier pivoted on said rocker and extending substantially at right angles .to the direction ofmovement of the adjacent teeth of said rack, a second dog carrier pivoted on said rocker and extending at an obtuse angle to said first mentioned dog carrier, and spring means urging said carriers to normal position.

36; In an escapement mechanism for typewriters, in combination, a feed rack, a dog rocker extending substantially in the plane of said rack,- a dog carrier pivoted on one side of saidrocker and extending substantially at right. angles to the direction. of

movement of the adjacent teeth of said rack,

tuse angle to said first mentioned dogcar near, a stepping dog and a holding dog on said and second mentioneddog carriers respectively, and a spring connected to and extending between said dog carners.

'37. In an escapement mechanism for typewriters in combination, a feed rack, a dog rockerq therefor, a dog carrler plvoted on said' jrockei," and extending substantially at ifght "angles to the direction of movement the adjacent teeth of said rack, a second dog carrier pivoted onwsaid rocker and extendingat'an obtuse angle to said first men-, tioned dog carrier, a c011 spring connecting the outer ends ofsaid dog carriers, a fixed stop on said rocker for limiting movemenl of one of said dog CtIIiBIS, and a pivoted stop on said rocker ior limiting movement of the other of said cog carriers. i

In testimony Wher eofI afiix my signature, in the presence )f two witnesses.

I v NIL HQANDERSON.

Witnesses:

ALBERT H. Gsrswow, Jnssn: M. Ans 0P. 

